Sound transmission loss single number ratings

This article presents an assessment for the airborne sound insulation provided by single glazed panels. The glazed panels were glass, acrylic and polycarbonate with a thickness of 4 mm. The experiments were conducted in a transmission loss facility consisting of semi anechoic and reverberation chambers. The panels were subjected to airborne sound and the data collected. Glass, acrylic and polycarbonate panel absorb noise most effectively above 500 Hz with the absorption peaks at 1000 Hz. The single number sound reduction index (RW) for glass, polycarbonate and acrylic were 41 dB, 38 dB and 37 dB, respectively. This could be attributed mainly to the material density which is higher for the glass. Keywords: Sound transmission loss; glazing; insulation; weighted index

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Parametric Sensitivity Analysis of Factors Affecting Sound Transmission Loss of Multi-Layered Building Elements Using Taguchi Method

Archives of Acoustics ◽

10.2478/aoa-2014-0020 ◽

2015 ◽

Vol 39 (2) ◽

pp. 165-176 ◽

Cited By ~ 3

Author(s):

Naveen Garg ◽

Anil Kumar ◽

Sagar Maji

Keyword(s):

Taguchi Method ◽

Transmission Loss ◽

Sound Transmission ◽

Relative Importance ◽

Sound Transmission Loss ◽

Key Factors ◽

Factors Affecting ◽

Concrete Blocks ◽

Single Number ◽

Steel Stud

Abstract The paper presents application of Taguchi method in optimizing the sound transmission loss through sandwich gypsum constructions and those comprising of masonry concrete blocks and gypsum boards in order to investigate the relative influence of the various parameters affecting the sound transmission loss. The application of Taguchi method for optimizing sound transmission loss has been rarely reported. The present work uses the results analytically predicted on “Insul” software for various sandwich material configurations as desired by each experimental run in an L8 orthogonal array. The relative importance of the parameters on single-number rating, Rw (C, Ctr) is evaluated in terms of percentage contribution using Analysis of Variance (ANOVA). The ANOVA method reveals that type of studs, steel stud frame and number of gypsum layers attached are the key factors controlling the sound transmission loss characteristics of sandwich multi-layered constructions.

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Sound transmission loss through double glazing windows in low frequency range: comparison between finite element and experimental results

10.26678/abcm.diname2019.din2019-0014 ◽

2019 ◽

Author(s):

Jean-François Deü ◽

Rubens Sampaio

Keyword(s):

Finite Element ◽

Transmission Loss ◽

Low Frequency ◽

Sound Transmission ◽

Experimental Results ◽

Sound Transmission Loss ◽

Frequency Range

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Multiresonant Layered Acoustic Metamaterial (MLAM) solution for broadband low-frequency noise attenuation through double-peak sound transmission loss response

Extreme Mechanics Letters ◽

10.1016/j.eml.2021.101368 ◽

2021 ◽

pp. 101368

Author(s):

D. Roca ◽

J. Cante ◽

O. Lloberas-Valls ◽

T. Pàmies ◽

J. Oliver

Keyword(s):

Transmission Loss ◽

Low Frequency ◽

Sound Transmission ◽

Frequency Noise ◽

Noise Attenuation ◽

Sound Transmission Loss ◽

Low Frequency Noise ◽

Double Peak ◽

Acoustic Metamaterial

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Analysis of the transmission loss of double-leaf panels with an equivalent spring–mass model for studs

Journal of Mechanics ◽

10.1093/jom/ufaa020 ◽

2020 ◽

Vol 37 ◽

pp. 126-133

Author(s):

Yuan-Wei Li ◽

Chao-Nan Wang

Keyword(s):

Distribution Curve ◽

Transmission Loss ◽

Sound Transmission ◽

Experimental Results ◽

Sound Insulation ◽

Sound Transmission Loss ◽

Mass Model ◽

Steel Stud ◽

Panel Thickness ◽

Stiffness Distribution

Abstract The purpose of this study was to investigate the sound insulation of double-leaf panels. In practice, double-leaf panels require a stud between two surface panels. To simplify the analysis, a stud was modeled as a spring and mass. Studies have indicated that the stiffness of the equivalent spring is not a constant and varies with the frequency of sound. Therefore, a frequency-dependent stiffness curve was used to model the effect of the stud to analyze the sound insulation of a double-leaf panel. First, the sound transmission loss of a panel reported by Halliwell was used to fit the results of this study to determine the stiffness of the distribution curve. With this stiffness distribution of steel stud, some previous proposed panels are also analyzed and are compared to the experimental results in the literature. The agreement is good. Finally, the effects of parameters, such as the thickness and density of the panel, thickness of the stud and spacing of the stud, on the sound insulation of double-leaf panels were analyzed.

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